$ git clone -n https://src.fedoraproject.org/rpms/maven-invoker-plugin.git /var/lib/mock/f42-build-3409171-45146/root/chroot_tmpdir/scmroot/maven-invoker-plugin
Cloning into '/var/lib/mock/f42-build-3409171-45146/root/chroot_tmpdir/scmroot/maven-invoker-plugin'...
$ git fetch origin f33577c828d4c7e929e47864976dd908871d16e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-invoker-plugin
 * [new ref]         f33577c828d4c7e929e47864976dd908871d16e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f33577c Version 3.9.0